Executable (EXE)
Select to create a local out-of-process server. This option does not allow support for MFC or COM+ 1.0. It does not allow for the merging of proxy/stub code.

Service (EXE)
Select to create a Windows application that runs in the background when Windows starts. This option does not allow support for MFC or COM+ 1.0 or does not allow for the merging of proxy/stub code.

Allow merging of proxy/stub code
Select the Allow merging of proxy/stub code check box as a convenience when marshaling interfaces is required. This option puts the MIDL-generated proxy and stub code in the same executable as the server.

Support MFC
Select to specify that your object includes MFC support. This option links your project to the MFC libraries so that you can access any of the classes and functions they contain.

Support COM+ 1.0
Select to modify the project build settings to support COM+ 1.0 components. In addition to the standard list of libraries, the wizard adds the COM+ 1.0 component-specific library comsvcs.lib

In addition, the mtxex.dll is delay loaded on the host system when your application is launched.

Support component registrar If your ATL project contains support for COM+ 1.0 components, you can set this option. The component registrar allows your COM+ 1.0 object to obtain a list of components, register components, or unregister components (individually or all at once).